Which of the following character is not found in all the chordates:
1. Diaphragm
2. Coelom
3. Pharyngeal gill clifts
4. Dorsal nerve cord
In which of the following animal post-anal tail is found:
1. Earthworm
2. Lower invertebrate
3. Scorpion
4. Snake
In which of the following, the notochord is present in the embryonic stage?
1. | All chordates | 2. | Some chordates |
3. | Vertebrates | 4. | Non-chordates |